When I try to create a custom menu, the server does not send a player update automatic, I need to send a player.updateInventory() delayed with 2 ticks to show the item on result slot. This is normal?

Inventory inv = Bukkit.createInventory(event.getPlayer(), InventoryType.WORKBENCH);
inv.setItem(0, new ItemStack(Material.ACACIA_DOOR));
event.getPlayer().openInventory(inv);